BAE Systems provides the Flight Control Software
(FCS1), the electronic warfare systems, crew life support and escape
systems, aft fuselage, empennages as well as the horizontal and vertical
tails; Aft Fuselage and Tails

Lockheed Martin is the Prime contractor for F35.
LM performs aircraft final assembly, overall system integration, mission
system, and provides forward fuselage, wings and aircraft flight control
system